Category Archives: Clean Technology

This morning Saigon suffered yet another bad airmorning with the AQI (air quality indicator) at 162 (50 AQI and below is healthy). With cooler weather, the air pollution in Saigon tends to get worse in the morning due to temperature inversions. What is Temperature Inversion? Temperature inversion is when the surface air temperature is cooler […]

You are supposed to change your BlueAir HEPA filter every 6 months. There is a display that tells you when to change it. I decided to see how long I could use my HEPA filter before changing it. I judged the effectiveness using my AirVisual Node. Today my air purifier finally struggled jeep my bedroom […]

You always see workers gathering recyclables in Saigon. There are small privately owned centers in the city. Sometimes you will see workers meet in one area to aggregate what they collected. They will deliver these items just down Vinh Khánh street in District 4. Related posts: Good air vs bad air days in Saigon DIY […]

Nearly ready for purchases. Just waiting on our new fan design and HEPA filters. Currently the unit will use a Senko fan. Senko DIY air purifier with hepa filter. LaserEgg next to it. Coming soon. Related posts: DIY Vietnamese Air Purifier 6 Hour Test LaserEggs have returned BlueAir Air Purifier Good air vs bad air […]

At the request of people, I decided to do a TDS test of four more brands of bottled water that you can buy in Saigon. Please note, as some people will emphasis, I am just doing a TDS test to decide how pure the water is. For purposes of this test, anything below 50 ppm […]

I decided to do a post on all of the different PM 2.5 masks that I wear/wore in Saigon the past year. There are a large number of PM 2.5 masks available in both Saigon and Hanoi. Sadly, many are not real PM 2.5 masks nor do they meet N95 or N99 standards. I first […]

A beautiful Day 4 of Tet in Saigon today. Clear blue skies. PM 2.5 is at 68 AQI. Not bad. Below is a panoramic view of District 7 from my apartment in District 4. Phu My Bridge When you can see the Phu My Bridge, then you know the air is clean. It is roughly […]